“The Brueckner π-Orbitals in CCD Computations of the Rotational Barrier in Cumulenes”. V. N. Karazin Kharkiv National University Bulletin. Chemical series, no. 21 (December 3, 2012): 74–79. Accessed October 25, 2026. https://periodicals.karazin.ua/chemistry/article/view/14478.